Apparatus for evaporating liquors for the manufacture of glue



(Modem A. & E. LISTER.

Apparatus for Evaporating Liquors for the Manufacture of Glue. N0.228,542. ted June 8, 3880..

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N. PETERS, PHOTO-LITHOGRAFHER, WAEHXNGTON, D, C.

NITED STATES PATENT FFIQEQ ALFRED LISTER AND EDWVIN LISTER, OF NEWARK,NEW JERSEY.

SPECIFICATION forming part of Letters Patent No. 228,542, dated June 8,1880.

Application filed March J, 1880.

To all whom it may concern:

EDWIN LISTER, (the firm of LISTER BROTH- ERs,) both of the cityofNewark, in the county of Essex and State of New Jersey, have in ventedcertain new and useful Improvements in Apparatus for Eva jioratingLiquors for the Manufacture of Glue and other Purposes 5 and we dohereby declare the following to-be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same, reference being had to theaccompanying drawing, and to letters of reference marked thereon, whichform a part of this specification.

This invention relates to the evaporation of liquid in the manufactureof glue, and has for its object the production of a brighter and0therwise better quality of glue in less time than has been heretoforeaccomplished; and it consists in an apparatus comprising acasing,withinwhich is arranged a group or coil of pipes, beneath which is an inclinedtable, and under that a receiving-vat, so that when the liquid isintroduced into the apparatus and spread, by means of a perforated plateor trough at the top of the casin g, it will run or flow around andbetween the pipes, pursuing, as it were, a rippling course, and thenceonto an inclined table, over which it will pass in a thin sheet into avat below, from whence it may be elevated to the top of the apparatus,and caused to again. pursue the course as at first, and as often as maybe found necessary to reduce the liquid to the proper consistency forits formation into sheets of glue.

It differs from other apparatus in causing the liquid to traveldownward, as described, in athin rippling stream and at an inclinationfrom a perpendicular line, whereby the liquid is compelled to move moreslowly and expose a greater evaporatingsurface than where it passes overa smooth inclined surface, even though several of these inclinedsurfaces be arranged so that the liquid will flow first in one directionand then in an opposite direction.

The accompanying drawing, which illustrates the nature of the invention,represents a section of the mechanism employed in carrying out theprocess, in which-- (Model) A is the vat or reservoir containing theliquor to be reduced, which is connected, by the pipe (1, with asteam-pump or other means for drawing the liquor from said vat A andforcing it through a pipe, it, also connected with said pump, into atrough, B, located ten orfifteen feet above the vat A.

Across the top of said vat A are arranged supporting-beams b, which areconnected to gether by and support a slightly-inclined table, 0, whichis made usually of copper, and upon which the liquid falls, and slowly,in a thin sheet, runs off into the vat A. Upon each su 'iporting-beam bis erected a series or stack of metallic steam-boxes (I, said boxesresting one above the other, and so arranged that they may, whennecessary, be easily repaired. These boxes are connected each with theone opposite by a nest or group of pipes, c, in the manner indicated inthe drawing, which allows free passage of steam or heated air from onebox to the other, the boxes cl being supplied with steam or heated airfrom any generator by means of the tubing g and g, connected to saidboxes, the exhaust-steam finding egress through the tubes h and h on theopposite sides.

Above the horizontal tubes 0, for evaporating the liquor, is placed thetrough or troughs B, above referred to, the bottom of which isperforated at i, so that the liquor, asit is emptied into the trough,spreads over the whole bottom thereof, and passes, not too profusely,through said perforations i, and falls directly upon the said horizontalmetallic tubes 0 throughout their entire length. This trough B issupplied with liquor from the vat or reservoir A by means of asteam-pump, or by any other appropriate means for forcing or raisingliquids, and thence through the pipe is, as already stated.

The evaporating mechanism is all inelosed, or nearly so, by the walls 0,which prevent the access of cold air, and also prevent the steam frompassing out through the building in which the apparatus may be placed.Through the roof of said building is a chimney or flue, D, locatedimmediately over the trough B, to allow the steam or vapor arising fromthe liquor to pass off into the outer air.

In operating our invention the desired quantity of prepared liquor ispoured into the vat or reservoir A. The steam-pump is then put inoperation, and draws it through the tube a, and forces it up through thetube is into the trough B, from whence it flows through the perforationsi in the bottom of said trough B evenly, but, as already stated, not tooprofusely, over and through the several nests of heated horizontalmetallic tubes 0, pursuing an irregular course around and between thepipes, and then down upon the inclined table or dash-board 0, fromwhenceit flows in a thin sheet at an inclination from a perpendicularline, and, by reason thereof, slowly down into the vat or reservoirA,this process being continued until the liquor is reduced to therequiredconsistency, when it is run otf into coolers, which are allowedto stand, in the usual manner, until the liquor has hardened into asolid jelly prepared to be cut into slices for drying.

The table a is heated by means of the heatradiating tubes 0, and,further, by the heat thrown off from the heated liquid in the vatbeneath the table.

Having thus described our invention. what we claim, and desire to havesecured by Letters Patent, is-

1. The combination of perforated trough B,

heat-radiating tubes 0, inclined table 0, and vat A, the several partsbeing relatively arranged to operate as described.

2. An apparatus for evaporating liquor in the manufacture of glue,consisting of a chamber, 0, provided with escape-flue D, a series ofgroups of heat-radiating pipes arranged within said chamber, each groupbeing provided with separate and separable heads for the admission ofsteam, and also with separate inlet and exit pipes q q and b I), a defleeting-table beneath said radiating pipes, and a recei ing-vat beneathsaid table, substa-ntially as set forth.

3. The chamber 0, provided with escapetlue D, a perforateddistributing-trough, B, located in the upper part of said chamber, avat, A, in the lower part, a deflecting-table, 0, between said vat andtrough, and means for heating said table, substantially as and for thepurpose set forth.

In testimony that we claim the foregoing we have hereunto set our handsthis 24th day of February, 1880.

ALFRED LISTER. EDWIN LISTER. Witnesses OLIVER DRAKE, CHARLES H. PnLL.

